Whether there will be errors after frequency division is related to whether the amplitude of the signal after frequency division is stable and whether the waveform is regular. For the digital frequency divider, there will be errors in the first stage of frequency division, and then there will be no errors. The main error is caused by plastic surgery. If the amplitude of the frequency-divided signal is constant and the waveform is regular (such as sine wave, rectangular wave, triangular wave, etc.). ), there will be no error after frequency division. The frequency division error of signals with unstable amplitude and irregular waveform is random and difficult to calculate.